blob: e9dde294b2aaaec53cdc70282495317ee8db17f4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <sys/resource.h>
#include <sys/sysinfo.h>
#include "TaskManager.h"
#include "Task.h"
#include "TaskProcessor.h"
#include "utils/MathUtils.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Manager
///////////////////////////////////////////////////////////////////////////////
TaskManager::TaskManager() {
// Get the number of available CPUs. This value does not change over time.
int cpuCount = sysconf(_SC_NPROCESSORS_CONF);
// Really no point in making more than 2 of these worker threads, but
// we do want to limit ourselves to 1 worker thread on dual-core devices.
int workerCount = cpuCount > 2 ? 2 : 1;
for (int i = 0; i < workerCount; i++) {
String8 name;
name.appendFormat("hwuiTask%d", i + 1);
mThreads.add(new WorkerThread(name));
}
}
TaskManager::~TaskManager() {
for (size_t i = 0; i < mThreads.size(); i++) {
mThreads[i]->exit();
}
}
bool TaskManager::canRunTasks() const {
return mThreads.size() > 0;
}
void TaskManager::stop() {
for (size_t i = 0; i < mThreads.size(); i++) {
mThreads[i]->exit();
}
}
bool TaskManager::addTaskBase(const sp<TaskBase>& task, const sp<TaskProcessorBase>& processor) {
if (mThreads.size() > 0) {
TaskWrapper wrapper(task, processor);
size_t minQueueSize = INT_MAX;
sp<WorkerThread> thread;
for (size_t i = 0; i < mThreads.size(); i++) {
if (mThreads[i]->getTaskCount() < minQueueSize) {
thread = mThreads[i];
minQueueSize = mThreads[i]->getTaskCount();
}
}
return thread->addTask(wrapper);
}
return false;
}
///////////////////////////////////////////////////////////////////////////////
// Thread
///////////////////////////////////////////////////////////////////////////////
status_t TaskManager::WorkerThread::readyToRun() {
setpriority(PRIO_PROCESS, 0, PRIORITY_FOREGROUND);
return NO_ERROR;
}
bool TaskManager::WorkerThread::threadLoop() {
mSignal.wait();
Vector<TaskWrapper> tasks;
{
Mutex::Autolock l(mLock);
tasks = mTasks;
mTasks.clear();
}
for (size_t i = 0; i < tasks.size(); i++) {
const TaskWrapper& task = tasks.itemAt(i);
task.mProcessor->process(task.mTask);
}
return true;
}
bool TaskManager::WorkerThread::addTask(TaskWrapper task) {
if (!isRunning()) {
run(mName.string(), PRIORITY_DEFAULT);
} else if (exitPending()) {
return false;
}
ssize_t index;
{
Mutex::Autolock l(mLock);
index = mTasks.add(task);
}
mSignal.signal();
return index >= 0;
}
size_t TaskManager::WorkerThread::getTaskCount() const {
Mutex::Autolock l(mLock);
return mTasks.size();
}
void TaskManager::WorkerThread::exit() {
requestExit();
mSignal.signal();
}
}; // namespace uirenderer
}; // namespace android
|
